#!/bin/bash
########################################################################
# Author:
# Version: 0.1
# License: AGPL-3.0 (https://choosealicense.com/licenses/agpl-3.0/)
########################################################################
MY_PATH="`dirname \"$0\"`"              # relative
MY_PATH="`( cd \"$MY_PATH\" && pwd )`"  # absolutized and normalized
ME="${0##*/}"
YOU=$(ps auxf --sort=+utime | grep -w ipfs | grep -v -E 'color=auto|grep' | tail -n 1 | cut -d " " -f 1) && [[ ! $YOU ]] && echo "ipfs NOT RUNNING. EXIT" && exit 1
G1PUB=$(cat ~/.zen/secret.dunikey | grep 'pub:' | cut -d ' ' -f 2) && [[ ! $G1PUB ]] && echo "ERREUR G1PUB. EXIT" && exit 1
IPFSNODEID=$(cat ~/.ipfs/config | jq -r .Identity.PeerID)

########################################################################
# SCAN AND MANAGE KEYS BETWEEN MOVIES & FRIENDS
## Control IPNS key $MEDIAKEY.4FRIENDS + create, catch & spread MEDIAKEY to FRIENDS
########################################################################
echo "DEV MODE" && exit 0
read
########################################################################

for FRIEND in $(ls ~/.zen/ipfs/.$IPFSNODEID/FRIENDS); do
    [[ "$FRIEND" == "index.html" ]] && continue
    echo "$FRIEND ?"

    for MEDIAKEY in $(ls ~/.zen/ipfs/.$IPFSNODEID/KEY); do
        echo "MEDIAKEY=$MEDIAKEY"
        ## Do I have this IPNS key?
        ISKEY=$(ipfs key list -l | grep "$MEDIAKEY.4FRIENDS" | cut -d ' ' -f 2)
        echo "ISKEY=$ISKEY"
        ## Is there any key already from swarm for that MEDIAKEY
        PREVKEY=$(ls ~/.zen/ipfs_swarm/.12D*/KEY/$MEDIAKEY/*/$G1PUB/ 2>/dev/null)
        echo "PREVKEY=$ISKEY"
        ## A key is found in my swam
        if [[ $PREVKEY ]]; then
            echo "I found a MEDIAKEY for $MEDIAKEY : $PREVKEY"
            ## Do I have it localy available?
            if [[ ! $ISKEY ]]; then
                echo "don't have it local..."
                # decrypting PREVKEY to my ipfs keystore
                $MY_PATH/tools/natools.py decrypt -f pubsec -k "$HOME/.zen/secret.dunikey" -i "~/.zen/ipfs_swarm/.12D*/KEY/$MEDIAKEY/*/$G1PUB/$PREVKEY" -o "$HOME/.ipfs/keystore/${PREVKEY%.*}"
                ## Checking if ipfs deamon have it
                ISKEY=$(ipfs key list -l | grep "$MEDIAKEY.4FRIENDS" | cut -d ' ' -f 2)
                echo ".ipfs/keystore/${PREVKEY%.*} added..."
                [[ ! $ISKEY ]] && echo "Restarting ipfs..." && sudo service ipfs restart
            fi
        ## Station is Not spreading swarm key... just getting it back.
        continue
        fi

        echo "~/.zen/ipfs/.$IPFSNODEID/KEY/$MEDIAKEY/$G1PUB/$FRIEND/"
        ## No swarm or local MEDIAKEY, we are the first $MEDIAKEY creator in the swarm
        [[ ! $ISKEY ]] && echo "Creating $MEDIAKEY.4FRIENDS IPNS key" && IPNSKEY=$(ipfs key gen "$MEDIAKEY.4FRIENDS") && IPNSKEYFILE=$(~/.zen/astrXbian/zen/tools/give_me_keystore_filename.py "$MEDIAKEY.4FRIENDS")

        ## Sending encrypted MEDIAKEY to my swarm (sign if you want more security, but code ipfs signature verification is enough and better)
        if [[ ! -d ~/.zen/ipfs/.$IPFSNODEID/KEY/$MEDIAKEY/$G1PUB/$FRIEND/ ]]; then
            echo "MEDIAKEY $MEDIAKEY is missing to my $FRIEND"
            mkdir -p "~/.zen/ipfs/.$IPFSNODEID/KEY/$MEDIAKEY/$G1PUB/$FRIEND/"
            $MY_PATH/tools/natools.py encrypt -p $FRIEND -i "~/.ipfs/keystore/$IPNSKEYFILE" -o "~/.zen/ipfs/.$IPFSNODEID/KEY/$MEDIAKEY/$G1PUB/$FRIEND/$IPNSKEYFILE.encrypt"
            echo "Spreading  ~/.zen/ipfs/.$IPFSNODEID/KEY/$MEDIAKEY/$G1PUB/$FRIEND/$IPNSKEYFILE.encrypt"
        fi

        ## TODO : CHECK FOR DISAPEARED FRIENDS.
        read

    done
        read

done